Steel hollow sections (structural steel tube) are categorized into two main types: RHS (rectangular hollow sections) and SHS (square hollow sections) .Each type of hollow section has its own attributes, used for a specific purpose.

RHS

The full name of RHS is Rectangular Hollow Sections. Rectangular hollow sections (RHS) is a popular choice for mechanical, structural and construction applications. This is due to the flat surface resulting in a structural solution that is more economical for joining and various other types of fabrication works.

Due to the rectangular shape of this type of hollow section, when joining to other flat surfaces sections only need to be straight cut. RHS requires minimal edge preparation for welding or joining.

RHS can also be used for architectural aesthetics due to possessing clean lines alongside structural strength.

RHS (rectangular hollow steel) tubing is used for a wide variety of construction and fabrication purposes. This tubing is extremely popular for the construction of furniture, frames, and all sorts of load bearing uses. Rectangular hollow steel is preferred in situations where its flat sides allow it to fit against surface facings and is more appropriate than round tubing in many design environments. RHS tubes are also easier to work with during the fabrication process because straight edges can be fitted to the flat side more readily. RHS can be used for so many different types of metal fabrication. With the huge range of sizes and thicknesses available, it can be used in countless different ways. It’s the ideal choice for both light and heavy jobs.

SHS

The full name of SHS is Square Hollow Sections.

Square hollow sections (SHS) is another popular type of structural steel tube that’s kind of a middle-man between RHS and CHS in terms of attributes, appearance and structural behavior. SHS features a flat surface that’s also economical for joining and welding, with clean lines and minimal edge preparation required. SHS also features attributes of CHS, with its symmetrical appearance, formed in equal-sided square hollow sections, as opposed to circular sections. SHS provides an ideal balance between strength, functionality and aesthetic appearance for a multitude of applications that require all three aspects.